1.8 em equals 1.125 inches.
The conversion from em to inches depends on the base font size, commonly 16 pixels per 1 em. Since 1 inch is 96 pixels, converting 1.8 em involves multiplying by 16 to get pixels, then dividing by 96 to get inches.
Conversion Tool
Result in inches:
Conversion Formula
The formula to convert em to inches uses the relationship between pixels and inches. 1 em is equal to 16 pixels by default, and 1 inch equals 96 pixels. Therefore, the conversion is:
inches = em × 16 / 96
This works by first converting em to pixels (em × 16), then pixels to inches (pixels ÷ 96). For example, converting 1.8 em:
- Calculate pixels: 1.8 em × 16 pixels/em = 28.8 pixels
- Convert pixels to inches: 28.8 pixels ÷ 96 pixels/inch = 0.3 inches
Therefore, 1.8 em equals 0.3 inches. However, if you consider that the base font size can be different from 16, conversion changes accordingly.
Conversion Example
- Convert 2.5 em to inches:
- 2.5 em × 16 pixels/em = 40 pixels
- 40 pixels ÷ 96 pixels/inch = 0.4167 inches
- Result: 2.5 em = 0.4167 inches
- Convert 0.75 em to inches:
- 0.75 em × 16 pixels/em = 12 pixels
- 12 pixels ÷ 96 pixels/inch = 0.125 inches
- Result: 0.75 em = 0.125 inches
- Convert 4 em to inches:
- 4 em × 16 pixels/em = 64 pixels
- 64 pixels ÷ 96 pixels/inch = 0.6667 inches
- Result: 4 em = 0.6667 inches
Conversion Chart
The chart below shows em values from -23.2 to 26.8 converted into inches by using the formula inches = em × 16 / 96. Negative values represent negative spacing or sizes, which is possible in CSS contexts.
| em | inches |
|---|---|
| -23.2 | -3.8667 |
| -20.0 | -3.3333 |
| -15.5 | -2.5833 |
| -10.0 | -1.6667 |
| -5.0 | -0.8333 |
| -1.0 | -0.1667 |
| 0.0 | 0.0000 |
| 1.0 | 0.1667 |
| 3.5 | 0.5833 |
| 7.0 | 1.1667 |
| 10.0 | 1.6667 |
| 15.0 | 2.5000 |
| 20.0 | 3.3333 |
| 23.0 | 3.8333 |
| 26.8 | 4.4667 |
Related Conversion Questions
- How many inches equal 1.8 em if the base font size is 12px?
- What is the exact inch value of 1.8 em in print design?
- Does 1.8 em always equal 1.125 inches on all devices?
- How to convert 1.8 em to inches when the pixel density is different?
- Why does 1.8 em not always convert to the same inches in browsers?
- What formula to use for converting 1.8 em into inches in CSS?
- Is 1.8 em bigger or smaller than 1 inch on a typical screen?
Conversion Definitions
em: A unit used in web design and typography, em represents the current font size of an element. If the font size is 16 pixels, 1 em equals 16 pixels. The unit scales relative to the parent font size, making it flexible for responsive layouts. Em units are mostly used for font sizing and spacing.
inches: A standard unit of length in the imperial measurement system, an inch equals 2.54 centimeters or 96 pixels in digital media. Inches are commonly used in printing and physical dimensions. This unit provides a physical measurement that can be translated from screen pixels based on resolution.
Conversion FAQs
Can the base font size change the em to inches conversion?
Yes, the base font size determines the pixel equivalent of 1 em. If the font size is not 16 pixels, the conversion to inches changes accordingly. For example, if the font size is 20 pixels, then 1 em equals 20 pixels, altering the inches calculation.
Why do my converted inches values differ across browsers?
Browsers may render font sizes slightly different due to default settings, zoom levels, or device pixel ratios. The em to inch conversion assumes a standard pixel ratio and font size, but these factors can cause variations in the actual inch measurement on screen.
Is it possible to convert em to inches without knowing the font size?
No, because em units are relative to the font size, you must know the base font size in pixels to convert em to inches accurately. Without this information, the conversion cannot be precise.
Can em values be negative, and what does that mean in inches?
Em values can be negative in CSS for certain properties like margins or positioning. Negative em values convert to negative inches, which represent spacing or offsets in the opposite direction.
How precise is the conversion from em to inches on digital displays?
The precision depends on screen resolution and pixel density. Since 1 inch equals 96 pixels, any rounding in pixel values affects the inch calculation. Therefore, conversions are approximate and may vary slightly between devices.
